Are you expressing sarcasm here? Using the nub mouse is an infuriatingly frustrating exercise in trying to navigate the cursor to a point on the screen with some semblance of speed, and without overshoot. It's minimally five times slower than using a mouse.
Furthermore, middle mouse button + trackpoint scrolls as well, so scrolling really isn't an issue.
My job entails writing emails most of the day, Salesforce, and internal communication tools. I love not having to take my hands of home row. I haven't been able to quantify any speed improvement. But, I feel more focused and in the "zone" more often. Could all be my imagination. It could also be that I find ThinkPad keyboard wonderful to use too.
I do use the Adobe CC Suite for the occasional video, presentation, or mock up. No issue using the trackpoint there either.
I actually only came to it because I was so frustrated with the new Dell XPS 13 my company provided that I went and grabbed an old Lenovo out of storage.
I just ordered an old X230 and plan to spruce it up and use as my home PC. Might even try to dualboot MacOS.